φθαρτικῶς

From LSJ

ἄμεινον γὰρ ἑαυτῷ φυλάττειν τὴν ἐλευθερίαν τοῦ ἑτέρων ἀφαιρεῖσθαι → for it is better to guard one's own freedom than to deprive another of his

Source

Russian (Dvoretsky)

φθαρτικῶς: разрушающим образом, уничтожающе Arst.